Stahlecker



Dec. 20, 1960 F. STAHLECKER DRAWING MECHANISM FOR SPINNING MACHINESFiled 001;. 4, 1957 z m w w FRITZ s74; ECKER 3r out Arr-021v: Y5

United States Patent DRAWING MECHANISM FOR SPINNING MACHINES FritzStahlecker, Uberkingen, Germany, assignor to Wurtt. SpindelfabrikG.m.b.H., Sussen, Wurttemberg, Germany Filed Oct. 4, 1957, Ser. No.688,245

Claims priority, application Germany Oct. 4, 1956 5 Claims. (Cl. 19-131)The present invention relates to draw frames for spinning machines, andmore particularly to improvements in the upper pressure rollers and thecages for the upper belts thereof.

The cages for the upper belts of draw frames are usually mounted on thetwin rollers either alone or in pairs connected by a connecting web. Theindividual cages are usually of a more simple construction and moreeasily manufactured than the double cages which are connected by a web.Furthermore, the double cages are also dependent upon the spindlespacing and must therefore be made of various dimensions. Theirmanufacture becomes expensive because each cage spacing requiresseparate tools. The belts of the cages which are connected to each otherby a web also do not adapt themselves as well to their respective lowerbelts as the upper belts of the individual cages which are able to carry7 out small movements independently of each other. On the other hand,the cages which are connected to each other by a web are often moreeasily manipulated than the individual cages, particularly when they areinstalled in the draw frame. This is true particularly if the cages areused in draw frames with loading elements which may be raised or tiltedupwardly.

It is an object of the present invention to provide a cage of a newdesign which combines the advantages of both types of cages withoutretaining the disadvantages thereof.

An essential feature of this new cage design is the fact that the twoindividual cages which are movably mounted on the shaft of the twinroller are loosely coupled to each other by the shaft or by one or moreconnecting members on the shaft. The individual cages thus mounted onthe shaft may carry out small rotary movements independently of eachother about the shaft of the pressure roller. This small movability ofthe cages permits the upper belts to adapt themselves properly to thelower belts. Furthermore, the loosely coupled individual cages may bemanipulated within the draw frame just as easily as double cages.

Further objects, features, and advantages of the present invention willbe apparent from the following detailed description thereof,particularly when read with reference to the accompanying drawings, inwhich-- Fig. 1 illustrates a side view of a twin roller with individualcages according to the invention;

Fig. 2 illustrates a plan view, partly in cross section, of the twinroller according to Fig. 1 with two individual cages;

Fig. 3 illustrates a side view of the twin roller as shown in Figs. 1and 2 with individual cages installed in the loading saddle;

Fig 4 illustrates a side view, partly in cross section, of a twin rollerwith individual cages and an intermediate connecting member;

'Fig. 5 illustrates a plan view of the twin roller and the cagesaccording to Fig. 4;

2,964,805 Patented Dec. 20, 1960 Fig. 6 illustrates a side view, partlyin cross section, .of a pressure roller with individual cages and aconnecting member according to Figs. 4 and 5 installed in a loadingsaddle;

Fig. 7 illustrates a perspective view of the intermediate connectingmember as shown in Figs. 4 and 5 but removed from the shaft; while Fig.8 illustrates a perspective view of two associated intermediateelements.

Referring to the drawings, and first particularly to Figs. 1 and 2, theindividual cages 1 and 2 of the twin rollers are loosely mounted on ashaft 3 while the pressure rollers 4 and 5 are rotatably mounted onshaft 3. Each projecting end 6 and 7 of shaft 3 is provided with flatsurfaces 8 and 9 which are loosely embraced by the respective cage 1 or2 in a claw-like manner, as illustrated in Fig. 1.

Both cages 1 and 2 are thus loosely connected to each other by shaft 3of the twin roller and, by turning shaft 3, they may be placed into anydesired position and may also be retained therein by the provision ofsuitable means, for example, a spring 23 as shown in Fig. 3, wherebyshaft 3 will be positively but still rotatably retained within itsmounting saddle 22. This manner of construction considerably facilitatesthe installation of the roller in the draw frame.

The cages of the twin roller as illustrated in Figs. 4 and 5 are looselyconnected to each other by a special intermediate connecting member 11which is disposed between rollers 17 and 18 on shaft 12. They willtherefore always assume the same position as the individual cages shownin Figs. 1 and 2. The connecting member .11, shown in a perspective viewin Fig. 7, may be inexpensively produced of resilient sheet metal and beeasily attached to normal pressure rollers so as to fit loosely ortightly thereon. The two coupling portions 112 of connecting member 11serve as stops for the two arms 201 and 202 of the individual cages 19and 20, respectively. In some cases, as illustrated in Figs. 5, 6, and7, it may also be advisable to provide the connecting web 114 of member11 with projecting lugs 115 which are adapted to maintain member 11exactly at the center of shaft 12. These projecting lugs 115 engage intothe reduced portion of shaft 12 closely adjacent to the shoulderportions thereof.

The intermediate connecting member 11 for separating the cages of thetwin roller as shown in Figs. 4 and 5 is designed so as to permit it tobe installed into the holder 15 of the loading saddle 16, as shown inFig. 6, only if cages 19 and 20 assume a certain position relative toholder 15. This position depends upon the position of the connecting web114 in holder 15.

The connecting member 11 is preferably designed so that, after theroller has been installed into the loading saddle, the cages will onlybe able to carry out small rotary movements on shaft 12 which arelimited by stops on the connecting member which are adapted to engagewith the holder or loading saddle. These stops on the connecting memberfor limiting the small rotary movements of the cages are formed by theedges 114 and 114" of the connecting web 114 which are adapted to engagewith arms 151 or 152, respectively, of holder 15, as illustrated in Fig.6.

The stops for limiting the small rotary movements may also be formed byspecial lugs on holder 15 or on loading saddle 16, against which theconnecting member engages. These stops in loading saddle 16 may bedisposed in such a position that, when the holder is raised or tiltedupwardly, the cages'will assume a position from which they can be easilyreturned to the operative position.

:In certain cases it may be advisable to design the connecting member soas merely to act as a member for coupling the two cages but not so asalso to permit the installation of the roller into the holder exceptwithin a certain pivotal range of the cages. Such a connection of thetwo individual cages may be attained, for example, by providing twoseparate connecting members on the shaft. Fig. 8 illustrates aperspective view of two such connecting members 21 which may be clampeduponshaft 12. The coupling projections 211 limit the pivotal range ofeach individual cage relative to the shaft similar- 1y as those shown inFig. 4.

, Although my invention has been illustrated and described withreference to the preferred embodiments thereof, I wish to have itunderstood that it is in no way limited to the details of suchembodiments, but is capable of numerous modifications within the scopeof the appended claims.

Having thus fully disclosed my invention, what I claim 1. A drawingmechanism for spinning machines having upper belts, comprising a twinpressure roller having a shaft, two individual cages loosely mounted onsaid shaft so as to be movable thereon, and means for loosely couplingsaid cages to each other, said coupling means comprising associatedparts on said cages and on said shaft adapted loosely to engage witheach other whereby said cages are coupled with each other through saidshaft but are movable to a limited extent relative to each other.

2. A drawing mechanism for spinning machines having upper belts,comprising a twin pressure roller having a shaft, two individual cagesloosely mounted on said shaft so as to be movable thereon, and means forloosely coupling said cages to each other, said coupling meanscomprising at least one connecting member mounted on said shaftintermediate said cages and adapted loosely to engage with said cageswhereby said cages are coupled with each other through said connectingmember but are movable to a limited extent relative to each other.

3. A drawing mechanism for spinning machines having upper belts,comprising a twin pressure roller having a shaft, two individual cagesloosely mounted on said shaft so as to be movable thereon, and means forloosely coupling said cages to each other, said coupling meanscomprising at least one connecting member mounted on said shaftintermediate said cages and adapted loosely to engage with said cageswhereby said cages are coupled with each other through said connectingmember but are movable to a limited extent relative to each other,further comprising means for supporting said pressure roller, andassociated means on said connecting member and said supporting means forlimiting a rotary movement of said connecting member.

4. A drawing mechanism for spinning machines having upper belts,comprising a twin pressure roller having a shaft, two individual cagesloosely mounted on said shaft so as to be movable thereon, and means forloosely coupling said cages to each other, said coupling meanscomprising at least one connecting member mounted on said shaftintermediate said cages and adapted loosely to engage with said cageswhereby said cages are coupled with each other through said connectingmember but are movable to a limited extent relative to each other, saidconnecting member being resiliently clamped upon said shaft and havingcoupling projections on its outer ends adapted loosely to engage withsaid cages.

5. A drawing mechanism for spinning machines having upper belts,comprising a twin pressure roller having a shaft, two individual cagesloosely mounted on said shaft so as to be movable thereon, and means forloosely coupling said cages to each other, said coupling meanscomprising two connecting members resiliently clamped upon said shaftintermediate said cages and spaced from each other, each of saidconnecting members having a coupling projection adapted loosely toengage with said cages whereby said cages are coupled with each otherthrough said connecting members and said shaft but are movable to alimited extent relative to each other.

References Cited in the file of this patent UNITED STATES PATENTS1,448,192 Butler Mar. 13, 1923 2,267,443 Cobb Dec. 23, 1941 2,332,973Louie Oct. 26, 1943 2,771,640 Cotchett Nov. 27, 1956

